Casio fx-7400G, Руководство пользователя

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59
Graphing Chapter 4
k k
k k
k Trace
With trace, you can move a flashing pointer along a graph with the f , c , d , and
e cursor keys and obtain readouts of coordinates at each point. The following
shows the different types of coordinate readouts produced by trace.
• Rectangular Coordinate Graph • Parametric Function Graph
• Inequality Graph
u u
u u u
To use trace to read coordinates
Example To determine the points of intersection for graphs produced by
the following functions:
Y1:
y
=
x 2
– 3
Y2:
y
= –
x
+ 2
Use the following View Window parameters.
Xmin = –5 Ymin = –10
Xmax = 5 Ymax = 10
Xscl = 1 Yscl = 2
1. After drawing the graphs, press
1
(TRCE) to make the pointer appear at the far
left of the graph.
1
(TRCE)
• The pointer may not be visible on the graph when you press 1 (TRCE).
2. Use e to move the pointer to the first intersection.
e
~
e
x
/
y
coordinate values